Condensed sections: Terminology,types, and accumulation conditions |
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| Authors: | E Yu Baraboshkin |
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| Institution: | (1) Department of Regional Geology and the Earth Evolution, Faculty of Geology, Moscow State University, Moscow, 119991, Russia |
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| Abstract: | Condensed sections (CS) are abnormally thin but nominally complete sections embracing large stratigraphic intervals. They are subdivided with regard to sedimentation rate into CS (at sedimentation rate of 0.5–1 cm/ka) and ultracondensed sections (with a sedimentation rate <0.5 cm/ka), which can be both deep-water and shallow-water types. The mechanisms of CS accumulation include mechanical, chemical, biotic condensation, and nondeposition. Their combinations allow one to suggest some models of CS accumulation: (1) fast and (2) slow sea level rise and/or its low-amplitude fluctuations; (3) sea level drop; (4) global warming and (5) global cooling. |
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| Keywords: | hiatus condensed section sedimentation model |
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